How about sending a large number of photos to your friends/students/teachers etc.? Most of the time, people have problems in sending photos over the internet. On the other hand, sometimes we receive packets, from others, which cannot be seen unless they are unpacked! In other technical words, they are compressed (or zipped). How can one unzip it?
One good open source program is PeaZip. Besides the usual advantages of using open source, there is the added advantage that this program is capable of understanding several file formats. So forget about the problem of receiving a file and cannot open it just because it is not compatible with your system.
Another added advantage is that one of them is that one can encrypt files with PeaZip too! So again, one can forget about security problems when sending an exam paper or other sensitive school material (such as assignments by students) across the internet.
It can optimize the compression of photos (some other programs make a mess of your photos!!). Another asset would be that of splitting and joining your large files (we blogged about JSplit in a previous publication).
If that is not enough, well it can backup your files too!! Many worry when formatting the hard disk because of losing all the important material. How can one recover those infinite number of hours preparing lessons or doing assignments or papers? Well, PeaZip can be used for that purpose too. It's a super program! If you need any FAQ (frequently asked questions), well the link is here. Extra help may be found here.